Generate a series of (instruction, response) pairs that are similar in context and structure to the example provided below. Each pair should consist of a concise instruction followed by an appropriate, detailed response. The instruction should pose a clear task or question, while the response should provide a comprehensive answer or solution that could be understood by someone with a basic understanding of the subject.

Example pair: 
Instruction: In one or two sentences summarize how playing with children impacts relationships. 

In addition to learning and developing new skills, playing with your young child is also quality time that brings you closer together.

“Play supports the formation of the safe, stable and nurturing relationships with all caregivers that children need to thrive,” the AAP report states.

Strong emotional connections with their parents and caring adults help children develop a secure attachment. Knowing they can count on their parent to be there when they need them gives a child the confidence to play freely, explore, try new things and learn.

“What they most need are interactions, language, give and take,” writes Dr. Perri Klass. “Which can just be another way of saying, somebody to play with.”
Response: Playing with children is quality time interacting together, which supports a secure attachment and safe, stable, and nurturing relationships. Having strong emotional connections supports children as they explore, learn, and try new things. 

Your task is to generate more pairs that maintain this level of clarity and detail. The topic is Summarization. Write a long text of instruction by yourself, then summarize the given instruction in a response. Ensure that the responses are informative and accurate, suitable for an educational context. 

Store the generated pairs in JSON format, with each pair as an object within an array. Each object should have two key-value pairs: "instruction" and "response". For instance: 

{"contents": [{"instruction": "text", "response": "text"}, {"instruction": "text", "response": "text"}, ...]} 

Remember to maintain consistency in the format and ensure the generated pairs are diverse and cover a broad range of subjects. You must return the response in the asked format and you must not add any additional text in your response.

Explain the purpose of the periodic table in chemistry.
user
The periodic table organizes chemical elements based on their atomic structure and properties, facilitating the study and application of chemical behavior.
assistant